Collecting device of biological sample for researching swine enzootic pneumonia

Abstract

The invention discloses a collection device of a biological sample for researching swine enzootic pneumonia, and relates to the field of sample collection, the collection device comprises a holding rod, a guide rod and a collection rod, the guide rod is mounted at the front end of the holding rod, and a sampling channel is formed in the guide rod along the length direction; the sampling channel is sequentially provided with a front section, a middle section and a rear section from one end of the holding rod to the other end of the holding rod, a sampling swab head is mounted at the front end of the sampling rod, the sampling swab head sequentially penetrates through the front section, the middle section and the rear section and then extends out of the front end of the sampling channel, the sampling rod is further slidably sleeved with a protective sleeve, and the protective sleeve can completely cover the sampling swab head. According to the invention, the situation that the sampling swab head absorbs more pig oral mucus before being in contact with the throat can be avoided, and the sampling swab head can be wrapped in the sheath in the process of extracting the sampling swab head after the sampling swab head is adhered to the pig throat mucus, so that the mucus on the sampling swab head can be prevented from being extruded out in the extracting process, and the sampling swab head is prevented from being damaged. The sampling effect is ensured.

Description

Technical Field

[0001] This invention relates to the field of biological sample collection, and more particularly to a biological sample collection device for studying swine respiratory disease. Background Technology

[0002] In research and clinical testing of swine enzootic pneumonia, obtaining high-quality pharyngeal secretion samples is a key step in pathogen isolation and molecular diagnosis. Currently, common sampling methods mostly rely on directly using a sampling swab to scrape or dip into the pig's mouth. However, in this type of direct sampling, the swab tip inevitably comes into contact with the tongue, buccal mucosa, and oral secretions during its journey from the mouth to the throat. This results in the swab adsorbing a large amount of mucus and impurities from non-target areas before sampling the target area—the throat. This not only dilutes the concentration of the target pathogen but may also introduce interference from other microorganisms in the oral cavity, thus affecting the sensitivity and specificity of subsequent pathogen detection. Furthermore, during the swab removal process after sampling, the lack of effective protection for the swab tip allows the closing and squeezing action of the oral tissues to easily scrape off some of the adsorbed throat secretions. This sample loss is even more significant when pigs are swallowing or struggling, leading to uncertainty in the quantity and quality of the actual samples submitted for testing and affecting the reliability of the test results. Summary of the Invention

[0003] (a) Purpose of the invention In view of this, the purpose of this invention is to provide a biological sample collection device for studying swine respiratory disease. This device can avoid the situation where the sampling swab head absorbs a lot of swine oral mucus before it even touches the throat. Furthermore, when the swab head has already absorbed swine throat mucus, it can be covered by a protective sleeve during the extraction process. This can prevent the swab head from being squeezed out during extraction, thus ensuring the sampling effect.

[0004] (II) Technical Solution To achieve the above-mentioned technical objectives, the present invention provides a biological sample collection device for studying swine respiratory disease, comprising a gripping rod, a guide rod, and a collection rod. The guide rod is installed at the front end of the gripping rod, and a sampling channel is formed inside the guide rod along its length. The sampling channel is sequentially divided into a front section, a middle section, and a rear section from one end of the gripping rod to the other. A sampling swab head is installed at the front end of the collection rod. The sampling swab head passes through the front section, the middle section, and the rear section in sequence and extends out from the front end of the sampling channel. A protective sleeve is also slidably fitted onto the collection rod, and the protective sleeve can completely cover the sampling swab head. The inner diameter of the front section is larger than the outer diameter of the sheath. The middle section adopts a narrowing structure with the inner diameter gradually decreasing from the end connected to the front section to the end connected to the rear section. The inner diameter of the end of the middle section connected to the rear section is smaller than the outer diameter of the sheath.

[0005] As a further description of the above technical solution: the front end of the sampling rod is threaded with a metal head, the sampling swab head is fixed on the metal head, and the end of the sheath is embedded with a magnetic ring. The metal head can be attracted to the magnetic ring. When the sampling swab head is inserted into the sampling channel, the sheath will not separate from the sampling swab head due to the attraction between the metal head and the magnetic ring. It will only separate from the sampling swab head when the sheath reaches the middle front end and is blocked. Therefore, it can be ensured that the sheath can wait for the sampling swab head at the middle front end position. When the sampling swab head is completely inside the sheath, the sampling rod is pulled out, and the sampling swab head and the sheath are pulled out together.

[0006] As a further description of the above technical solution: a metal ring is embedded in the inner wall of the middle section, the position of the metal ring corresponds to the magnetic ring on the sheath, and the metal ring can be attracted to the magnetic ring, so that when the sheath reaches the front end position of the middle section, the sheath will not slide abnormally backward when it reaches the front end position of the middle section due to the attraction between the metal ring and the magnetic ring.

[0007] As a further description of the above technical solution: the guide rod includes a main rod and a head rod. The head rod is connected to the front end of the main rod and has an angle with the head rod, which can adapt to the oral cavity structure of the pig and facilitate the direct insertion of the collection rod into the pharynx of the pig.

[0008] As a further description of the above technical solution: the sampling channel at the connection position between the main rod and the head rod adopts an enlarged diameter structure. The length of the enlarged diameter structure is greater than the length of the sheath, so that the sheath can be guided through the connection position between the main rod and the head rod. This can avoid the situation where the sheath and the sampling swab head are stuck at the connection position between the main rod and the head rod, resulting in the inability to sample normally.

[0009] As a further description of the above technical solution: an installation hole is provided above the front end of the head rod, and a cold light source is installed inside the installation hole. The cold light source is fixed by bolts, and a transparent cover is installed on the top of the cold light source. The transparent cover covers the installation hole. The cold light source can assist in observing the condition inside the pig's mouth, which facilitates the insertion of the guide rod and subsequent sampling.

[0010] As a further description of the above technical solution: the guide rod also includes an adjustment part, and a connecting guide groove is provided at the front length direction of the front end of the gripping rod. The adjustment part is movably inserted into the connecting guide groove. A locking mechanism for locking the adjustment part is installed on the top of the gripping rod, so that the guide rod can change the overall effective length by adjusting the insertion depth of the adjustment part, thereby making it suitable for use in pigs at different stages.

[0011] As a further description of the above technical solution: the upper surface of the adjusting part is provided with a toothed area along the length direction. The locking mechanism includes an adjusting body, a pressure plate, and a control component. The adjusting body has a cavity inside, and the pressure plate is installed inside the cavity. The pressure plate can slide vertically within the cavity. The bottom of the pressure plate is provided with a toothed part that can engage with the toothed area. The control component is used to control the movement of the pressure plate so that the toothed part at the bottom of the pressure plate can engage or disengage with the toothed area. When it is necessary to adjust the overall effective length of the guide rod, it is only necessary to control the movement of the pressure plate through the control component to disengage the toothed part at the bottom of the pressure plate from the toothed area, and then pull the guide rod to move the adjusting part inward or outward. The operation is convenient and quick. After the adjustment is in place, the pressure plate is controlled to move through the control component, and the toothed part at the bottom of the pressure plate engages with the toothed area, thereby locking the length of the guide rod.

[0012] As a further description of the above technical solution: the upper surface of the adjusting body is provided with a sliding cavity along the length direction, the control component includes a slider, the slider is slidably installed in the sliding cavity, an adjusting insert plate is installed at the bottom of the slider, the front end of the adjusting insert plate adopts a wedge structure, the end of the pressure plate near the adjusting insert plate is provided with an insertion cavity, the front end of the insertion cavity is provided with a wedge surface that can be adapted to the wedge structure at the front end of the adjusting insert plate, when the front end of the adjusting insert plate is fully inserted into the interior of the insertion cavity, and the wedge structure at the front end of the adjusting insert plate is fully fitted with the wedge surface inside the insertion cavity, the pressure plate moves down to the bottom, and the toothed part at the bottom of the pressure plate engages with the toothed area to achieve effective length locking of the guide rod.

[0013] As a further description of the above technical solution: a fastener is detachably covered above the cavity on the upper part of the adjusting body. Multiple springs are installed between the bottom of the fastener and the pressure plate. Under the action of the spring force, when the adjusting plate gradually retracts, the pressure plate can automatically move upward, thereby allowing the guide rod to enter an adjustable unlocked state, which facilitates the effective length adjustment of the guide rod.

[0014] In the above technical solution, the present invention provides a biological sample collection device for studying swine respiratory disease. This device features a sampling channel on the guide rod for inserting a sampling swab head. Therefore, the sampling channel will not come into contact with other parts of the pig's mouth before contacting the pharynx, thus preventing the sampling swab head from absorbing excessive oral mucus before even touching the pharynx. The sheath design ensures that the sampling swab head is enclosed within the sheath during extraction after the pharyngeal mucus has adhered, preventing the mucus from being squeezed out during extraction and ensuring sampling effectiveness. Furthermore, the device is designed so that the effective length of the entire guide rod can be adjusted, making it suitable for use with pigs at different stages and improving its applicability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 A schematic diagram of the overall structure of a biological sample collection device for studying swine respiratory disease provided by the present invention; Figure 2 This is a schematic diagram of another perspective of the biological sample collection device for studying swine respiratory disease provided by the present invention. Figure 3 A partial cross-section of the gripping rod in a biological sample collection device for studying swine enzootic pneumonia provided by the present invention. Figure 1 ; Figure 4 A partial cross-section of the gripping rod in a biological sample collection device for studying swine enzootic pneumonia provided by the present invention. Figure 2 ; Figure 5 A schematic diagram of the guide rod structure in a biological sample collection device for studying swine respiratory disease provided by the present invention; Figure 6 A partial cross-sectional view of the guide rod in a biological sample collection device for studying swine respiratory disease provided by the present invention; Figure 7 This is a schematic diagram of the collection rod structure in a biological sample collection device for studying swine respiratory disease provided by the present invention.

[0017] Figure Descriptions: 1. Holding rod; 10. Connecting guide groove; 2. Guide rod; 20. Adjustment part; 200. Toothed area; 21. Main rod; 22. Head rod; 220. Mounting hole; 221. Transparent cover; 222. Cold light source; 223. Metal ring; 23. Sampling channel; 230. Front section; 231. Middle section; 232. Rear section; 3. Collection rod; 30. Sampling swab head; 300. Metal head; 31. Sheath; 310. Magnetic ring; 4. Locking mechanism; 40. Adjustment body; 400. Sliding cavity; 401. Receptacle; 41. Fastener; 42. Pressure plate; 420. Insertion cavity; 43. Spring; 44. Adjustment insert plate. Detailed Implementation

[0018] The following description is exemplary in nature and is not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these figures, the same or similar reference numerals indicate the same or similar parts and features. The figures are merely schematic representations of the concept and principles of embodiments of this disclosure and do not necessarily show the specific dimensions and scale of the various embodiments of this disclosure. Certain details or structures of embodiments of this disclosure may be exaggerated in particular portions of certain figures.

[0019] like Figures 1-7 As shown: This embodiment provides a technical solution: a biological sample collection device for studying swine respiratory disease, used for sampling secretions from the pharynx of pigs, comprising a holding rod 1, a guide rod 2, and a collection rod 3. The guide rod 2 is installed at the front end of the holding rod 1, and a sampling channel 23 is formed inside the guide rod 2 along its length. The sampling channel 23 is sequentially divided into a front section 230, a middle section 231, and a rear section 232 from one end of the holding rod 1 to the other. A sampling swab head 30 is installed at the front end of the collection rod 3. The sampling swab head 30 passes through the front section 230, the middle section 231, and the rear section 232 in sequence and extends out from the front end of the sampling channel 23. A protective sleeve 31 is also slidably sleeved on the collection rod 3, and the protective sleeve 31 can completely cover the sampling swab head 30. The inner diameter of the front section 230 is larger than the outer diameter of the sheath 31. The middle section 231 adopts a narrowing structure with the inner diameter gradually decreasing from the end connected to the front section 230 to the end connected to the rear section 232. The inner diameter of the end of the middle section 231 connected to the rear section 232 is smaller than the outer diameter of the sheath 31. Working principle: When using this device, the operator first puts on long-arm protective gloves, fixes the pig with a standard restraint, and installs the restraint to open its mouth. The sampling swab head 30, covered by a protective sleeve 31, is inserted into the sampling channel 23. Then, the guide rod 2 is slowly inserted into the pig's throat through its mouth. The sampling rod 3 is then continuously pushed, causing the sampling swab head 30 to pass through the front section 230, the middle section 231, and the rear section 232 in sequence before extending out from the front of the sampling channel 23. When the front of the protective sleeve 31 reaches the connection point between the middle section 231 and the rear section 232, the protective sleeve 31 is blocked and gradually separates from the sampling swab head 30. The protective sleeve 31 remains in the middle section 231, while the sampling swab head 30 continues to move outward until it extends out of the sampling channel 23 into the pig's throat. Next, rotate the sampling rod 3 so that the sampling swab head 30 can collect secretions from the pig's throat. Finally, pull out the sampling rod 3. During the withdrawal process, when the sampling swab head 30 returns to the middle section 231, it can re-enter the sheath 31. At this time, continue to pull out the sampling rod 3 so that the sheath 31 can cover the sampling swab head 30 again. The sampling swab head 30 and the sheath 31 are pulled out of the sampling channel 23 together. After the sampling swab head 30 and the sheath 31 are completely pulled out, unscrew the sampling swab head 30 into the test tube containing the pre-filled preservation solution, tighten the cap, and then remove the guide rod 2 as a whole to complete the sampling. It should also be noted that the rear end 232 sampling has a funnel-shaped structure with a gradually increasing diameter from the inside to the outside, which facilitates the rapid entry of the sampling rod 3 into the sampling channel 23 when it is pulled out.

[0020] In summary, this device is used to sample secretions from the pharynx of pigs. Because the length from the pharynx to the outside of the mouth is relatively long, the guide rod 2 needs to be longer. To ensure the sampling swab head 30 accurately adheres to the secretions from the pharynx, the device provides a sampling channel 23 on the guide rod 2 for the sampling swab head 30 to insert into. Therefore, the sampling channel 23 will not come into contact with other parts of the pig's mouth before contacting the pharynx, thus preventing the sampling swab head 30 from absorbing too much oral mucus before even touching the pharynx. The sheath 31 ensures that the sampling swab head 30 is enclosed within the sheath 31 during the extraction process after the pharyngeal mucus has adhered, preventing the mucus on the sampling swab head 30 from being squeezed out during extraction and ensuring sampling effectiveness. It should also be noted that the collection rod 3 is supported by a flexible and rigid metal wire, and the front end of the collection rod 3 is threadedly connected to the sampling swab head 30.

[0021] Specifically, such as Figures 6-7As shown, to prevent the sheath 31 from separating from the sampling swab head 30 before it reaches the front end of the middle section 231 when the sampling swab head 30 is inserted into the sampling channel 23, thus preventing the sampling rod 3 from entering the sheath 31 at the front end of the middle section 231 and causing the mucus on the sampling swab head 30 to be squeezed out, in this embodiment, a metal head 300 is threaded onto the front end of the sampling rod 3, and the sampling swab head 30 is fixed to the metal head 300. A magnetic ring 310 is embedded at the end of the sheath 31, and the metal head 300 can attract the magnetic ring 310. Based on this, when the sampling swab head 30 is inserted into the sampling channel 23, the sheath 31 will not separate from the sampling swab head 30 due to the attraction between the metal head 300 and the magnetic ring 310. It will only separate from the sampling swab head 30 when the sheath 31 is blocked at the front end of the middle section 231. Therefore, it can be ensured that the sheath 31 can be fixed at the front end of the middle section 231 and wait for the sampling swab head 30. When the sampling swab head 30 is completely inside the sheath 31, the sampling rod 3 is pulled out, and the sampling swab head 30 and the sheath 31 are pulled out together.

[0022] Specifically, such as Figures 6-7 As shown, in order to ensure that the sheath 31 does not slide abnormally backward when it reaches the front end of the middle section 231, which would prevent the sampling rod 3 from entering the sheath 31 at the front end of the middle section 231 when it is pulled out, thus causing the mucus on the sampling swab head 30 to be squeezed, in this embodiment, a metal ring 223 is embedded in the inner wall of the middle section 231. The position of the metal ring 223 corresponds to the magnetic ring 310 on the sheath 31, and the metal ring 223 can be attracted to the magnetic ring 310. So when the sheath 31 reaches the front end of the middle section 231, the sheath 31 will not slide abnormally backward when it reaches the front end of the middle section 231 due to the attraction between the metal ring 223 and the magnetic ring 310.

[0023] Specifically, such as Figures 1-6 As shown, in order to adapt to the oral cavity structure of pigs and facilitate the guidance of the collection rod 3, in this embodiment, the guide rod 2 includes a main rod 21 and a head rod 22. The head rod 22 is connected to the front end of the main rod 21 and has an angle with the head rod 22. This can adapt to the oral cavity structure of pigs and facilitate the direct insertion of the collection rod 3 into the pharynx of pigs. Specifically, the angle between the main rod 21 and the head rod 22 is 120°±10°.

[0024] Specifically, such as Figure 6As shown, to prevent the sheath 31 and the sampling swab head 30 from getting stuck at the connection position between the main rod 21 and the head rod 22 during insertion, in this embodiment, the sampling channel 23 at the connection position between the main rod 21 and the head rod 22 adopts an enlarged diameter structure. The length of the enlarged diameter structure is greater than the length of the sheath 31, so that the sheath 31 can be guided through the connection position between the main rod 21 and the head rod 22. This can avoid the situation where the sheath 31 and the sampling swab head 30 get stuck at the connection position between the main rod 21 and the head rod 22, resulting in the inability to sample normally. In addition, it should be noted that the enlarged diameter structure is to enlarge the inner diameter of the sampling channel 23 so that it will not affect the insertion of the sheath 31 and the turning point of the sheath 31.

[0025] Specifically, such as Figures 5-6 As shown, in order to facilitate the insertion of the guide rod 2 and subsequent sampling, in this embodiment, a mounting hole 220 is provided above the front end of the head rod 22. A cold light source 222 is installed inside the mounting hole 220 and is fixed by bolts. A transparent cover 221 is also installed on the top of the cold light source 222, which covers the mounting hole 220. Based on this, the cold light source 222 can help observe the condition inside the pig's mouth, which facilitates the insertion of the guide rod 2 and subsequent sampling.

[0026] Specifically, such as Figures 1-5 As shown, in order to improve the adaptability of the device and make it suitable for use with pigs at different stages, in this embodiment, the guide rod 2 also includes an adjustment part 20. A connecting guide groove 10 is provided at the front length direction of the front end of the gripping rod 1. The adjustment part 20 is movably inserted into the interior of the connecting guide groove 10. A locking mechanism 4 for locking the adjustment part 20 is installed on the top of the gripping rod 1, so that the guide rod 2 can change the overall effective length by adjusting the insertion depth of the adjustment part 20, thereby making it suitable for use with pigs at different stages.

[0027] Specifically, such as Figures 1-5As shown, in order to adjust the overall effective length of the guide rod 2, in this embodiment, the upper surface of the adjusting part 20 is provided with a toothed area 200 along the length direction. The locking mechanism 4 includes an adjusting body 40, a pressure plate 42, and a control component. The adjusting body 40 has a cavity 401 inside, and the pressure plate 42 is installed inside the cavity 401. The pressure plate 42 can slide vertically within the cavity 401. The bottom of the pressure plate 42 is provided with a toothed portion that can engage with the toothed area 200. The control component is used to control the movement of the pressure plate 42. The toothed portion at the bottom of the pressure plate 42 can engage or disengage with the toothed area 200. Based on this, when it is necessary to adjust the overall effective length of the guide rod 2, it is only necessary to control the pressure plate 42 to move through the control component, so that the toothed portion at the bottom of the pressure plate 42 disengages from the toothed area 200, and then pull the guide rod 2 to move the adjustment part 20 inward or outward. The operation is convenient and quick. After the adjustment is in place, the pressure plate 42 is moved through the control component again, and the toothed portion at the bottom of the pressure plate 42 engages with the toothed area 200, thereby locking the length of the guide rod 2.

[0028] Specifically, such as Figures 3-5 As shown, in order to control the pressure plate 42, in this embodiment, a sliding cavity 400 is provided on the upper surface of the adjusting body 40 along the length direction. The control component includes a slider 45, which is slidably installed in the sliding cavity 400. An adjusting insert plate 44 is installed at the bottom of the slider 45. The front end of the adjusting insert plate 44 adopts a wedge-shaped structure. A cavity 420 is provided at one end of the pressure plate 42 near the adjusting insert plate 44. The front end of the cavity 420 is provided with a wedge-shaped surface that can be adapted to the wedge-shaped structure at the front end of the adjusting insert plate 44. When the front end of the adjusting insert plate 44 is fully inserted into the cavity 420 and the wedge-shaped structure at the front end of the adjusting insert plate 44 is fully fitted with the wedge-shaped surface inside the cavity 420, the pressure plate 42 moves down to the bottom. The toothed part at the bottom of the pressure plate 42 engages with the toothed area 200 to lock the effective length of the guide rod 2. Based on this, the pressure plate 42 can be controlled simply by sliding the slider 45, which is convenient and quick to operate.

[0029] Specifically, such as Figures 3-5 As shown, in order to enable the pressure plate 42 to move automatically upward when the slider 45 controls the adjustment plate 44 to retract, so that the guide rod 2 enters the adjustable unlocked state, in this embodiment, a fastener 41 is detachably covered above the cavity 401 on the upper part of the adjustment body 40. Multiple springs 43 are installed between the bottom of the fastener 41 and the pressure plate 42. Under the elastic force of the springs 43, when the adjustment plate 44 gradually retracts, the pressure plate 42 can move automatically upward, so that the guide rod 2 enters the adjustable unlocked state, which facilitates the effective length adjustment of the guide rod 2.

[0030] The exemplary implementation of the solution proposed in this disclosure has been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the spirit of this disclosure, and various combinations can be made to the various technical features and structures proposed in this disclosure without exceeding the protection scope of this disclosure, which is determined by the appended claims.

Claims

1. A device for collecting biological samples for the study of porcine respiratory disease complex, characterized in that, It includes: A holding rod (1); A guide rod (2) is installed at the front end of the holding rod (1), and the inside of the guide rod (2) is opened along the length direction to form a sampling channel (23), and the sampling channel (23) is sequentially provided with a front section (230), a middle section (231) and a rear section (232) from one end of the holding rod (1) to the other end; A collection rod (3) is provided with a sampling swab head (30) at the front end, the sampling swab head (30) sequentially passes through the front section (230), the middle section (231) and the rear section (232) and then extends out of the front end of the sampling channel (23), and a sheath (31) is slidably sleeved on the collection rod (3), and the sheath (31) can completely cover the sampling swab head (30); Wherein, the inner diameter of the front section (230) is greater than the outer diameter of the sheath (31), the middle section (231) is provided with a narrowing structure whose inner diameter gradually decreases from the end connected with the front section (230) to the end connected with the rear section (232), and the inner diameter of the end connected with the rear section (232) of the middle section (231) is smaller than the outer diameter of the sheath (31).

2. The device for collecting biological samples for studying porcine respiratory disease according to claim 1, characterized in that, The front end of the collection rod (3) is threadedly combined with a metal head (300), the sampling swab head (30) is fixed on the metal head (300), and a magnetic ring (310) is embedded at the end of the sheath (31), and the metal head (300) can be attracted to the magnetic ring (310).

3. The device for collecting biological samples for studying porcine respiratory disease according to claim 2, characterized in that, A metal ring (223) is embedded on the inner wall of the middle section (231), the position of the metal ring (223) corresponds to the magnetic ring (310) on the sheath (31), and the metal ring (223) can be attracted to the magnetic ring (310).

4. The device for collecting biological samples for studying porcine respiratory disease according to any of claims 1 to 3, characterized in that, The guide rod (2) includes a main rod (21) and a head rod (22), the head rod (22) is connected at the front end of the main rod (21), and there is an included angle between the head rod (22) and the main rod (21).

5. The device for collecting biological samples for studying porcine respiratory disease according to claim 4, characterized in that, The connection position of the main rod (21) and the head rod (22) in the sampling channel (23) is provided with an expanding structure, the length of the expanding structure is greater than the length of the sheath (31), so that the sheath (31) can guide through the connection position of the main rod (21) and the head rod (22).

6. The device for collecting biological samples for studying porcine respiratory disease according to claim 4, characterized in that, An installation hole (220) is formed above the front end of the head rod (22), a cold light source (222) is installed inside the installation hole (220), the cold light source (222) is fixed by bolts, and a transparent cover (221) is further installed on the top of the cold light source (222), and the transparent cover (221) covers the installation hole (220).

7. The device for collecting biological samples for studying porcine respiratory disease complex according to claim 1, wherein The guide rod (2) further includes an adjusting part (20), a connecting guide groove (10) is formed in the front end of the holding rod (1) in the length direction, the adjusting part (20) is movably inserted into the inside of the connecting guide groove (10), and a locking mechanism (4) for locking the adjusting part (20) is installed on the top of the holding rod (1).

8. The device for collecting biological samples for studying porcine respiratory disease according to claim 7, characterized in that, The upper surface of the adjusting part (20) is provided with a toothed area (200) along the length direction, and the locking mechanism (4) includes: An adjusting body (40) is provided with a cavity (401) in the inside; A pressing plate (42) is installed inside the accommodating cavity (401), the pressing plate (42) can slide in the vertical direction inside the accommodating cavity (401), the bottom of the pressing plate (42) is provided with a toothed part capable of engaging with the toothed area (200); A control assembly is used to control the movement of the pressing plate (42), so that the toothed part of the bottom of the pressing plate (42) can engage or disengage with the toothed area (200).

9. The device for collecting biological samples for studying porcine respiratory disease according to claim 8, characterized in that, The upper surface of the adjusting body (40) is provided with a sliding cavity (400) along the length direction, the control assembly includes a sliding block (45), the sliding block (45) is slidingly installed in the sliding cavity (400), the bottom of the sliding block (45) is installed with an adjusting plug-in plate (44), the front end of the adjusting plug-in plate (44) is provided with a wedge-shaped structure, one end of the pressing plate (42) close to the adjusting plug-in plate (44) is provided with a plug-in cavity (420), the front end of the plug-in cavity (420) is provided with a wedge-shaped surface capable of adapting to the wedge-shaped structure of the front end of the adjusting plug-in plate (44), when the front end of the adjusting plug-in plate (44) is completely inserted into the inside of the plug-in cavity (420), and the wedge-shaped structure of the front end of the adjusting plug-in plate (44) completely matches the wedge-shaped surface inside the plug-in cavity (420), the pressing plate (42) moves downward to the bottom, and the toothed part of the bottom of the pressing plate (42) engages with the toothed area (200).

10. The device for collecting biological samples for studying porcine respiratory disease according to claim 9, characterized in that, The upper part of the adjusting body (40) is detachably covered with a fastener (41), a plurality of springs (43) are installed between the bottom of the fastener (41) and the pressing plate (42).

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